Rawa Blues Festival takes place every year at the beginning of October, in the city of Katowice, Poland. Since its very beginning in 1981, Rawa Blues became the biggest and with the time also the most recognizable blues event in Poland. For the first 10 years it was organized as a nationwide all-day blues sessions in several venues. With time it evolved, becoming an international blues festival at the beginning of the 90s. Then, the organizers started to invite the world 's greatest blues artists. The organizers and independent journalists claim that Rawa Blues Festival is the world’s biggest indoor blues festival.